Office chair



FIG. 1 is a perspective view of an office chair showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a right side elevational view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom plan view thereof; and,

FIG. 8 is another perspective view of the office chair of FIGS. 1 through 7 with arms, adjustment mechanisms and a base being shown in broken lines for illustrative purposes only and forming no part of the claimed design. 

The ornamental design for an office chair, as shown and described. 